﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _09简单工厂模式
{
    /// <summary>
    /// 业务逻辑-基类
    /// </summary>
    abstract class Operation
    {
        public double NumberA { get; set; }
        public double NumberB { get; set; }
        public abstract double GetResult();     
    }
}
